They also want greater correlation between price and perceived value. (modernlawmagazine.com)
Although Be10 records do not show great correlation below the decadal scale (but they will show the 11 year cycle if taken at annual resolution) they start to show much better agreement at 30 + yr timescales and in identifying large events. (realclimate.org)
The China series has a reasonable (r = 0.22), but not great correlation — and it gets a moderate low weight. (climateaudit.org)